Catalyst for dehydrocoupling of toluene or xylene

摘要

Disclosed herein is a catalyst suitable for dehydrocoupling of toluene or xylene, represented by the general formula (I): MaTlbOc (I), wherein M represents yttrium, zinc or zirconium; a denotes a number in a range of 0.25 to 5, b denotes 1, and c denotes a number necessary for fulfilling the respective average atomic valencies of M and Tl in the oxidation states in which they exist in the composition represented by the formula (I), and a process for dehydrocoupling of toluene or xylene in the presence of the catalyst represented by the general formula (I).